Stop motion for twisting and winding machines



Oct. 14, 1941. P. J. THOMAS 2,

STOP MOTION FOR TWISTING AND WINDING MACHINES Filed Feb. 12, 1940 2 Sheets-Sheet l R I N M 7 l5: Iain @573; Jz'iw 1941- P. J. THOMAS STOP MOTION FOR TWISTING AND WINDING MACHINES Filed Feb. 12, 1940 2 bneets-Sheet 2 HIIII-JIII /A Patented Oct. 14, 1941 UNITED STATES PATENT OFFICE Paciiic J.Thomas,,Scranton, PaL, assignor to U. S.

Textile Machine company, Scranton, Pa., a corporation of Pennsylvania ApplicationFebruary 12, 1940;seiia1Nas1a5s2 -6 Claims. 1.12424 This invention relates to machines" for twisting andwinding yarn of the type in'which the'yarn is drawn upward off of aspoo'l rotated on a twister spindle and is wound on a take-up roll which is rotated by surface contactjbetween a revolving drum and the take-up roll or the,yarn wound thereon. Suchfmachine'sf are commonly known inithejtrade as up-twistersl v It is the'general object of my invention to provide an improved stop motion for such a machine by which the take-up roll and revolving drum will be'immediately separated'bn breakage or failure of the'yarn being wound."

A further object is to provide a stop motion having alightly balanced detector and having power-actuated releasing mechanism controlled by said detector. u I

Ihave also provided'an improved construction of guide-eye which is displ aceable for doifing and returnable to initial position;

Myinvention further. relates to arrangements and combinations of parts which will be hereinafter describedand morejparticularly pointed out in theapp'ended claims. j 1 v 1 v 'A preferred form of the invention is shown in the drawings, in which Fig.1 is a front elevation of my improved stop motion applied to'a winding machine; i

Fig. 2 is a sectional side elevation; taken along the line2 2 in Fig.1; f"

Fig. 3 is an enlarged partial 'front elevation, with certain parts shown in section;

rection of the arrow 4 in Fig.3; i h p Figs. 5 and 6 aredetail sectional side elevations, taken along the lines 5-5 and 66 in Fig.3 respectively; and Y v Fig. '7 is a partial side'elevationof a tension bar. ,7 V Referring to the drawings; '1 have shown parts of a winding machine comprising a, spool S mounted on a twister spindle H11and'rotated therewith. I have also shown a take-up roll R.

Fig.4 isa partialplanview, looking in the-di rotatably supported in the forked upper end ofa swinging frame F and engaging a drum D which is continuously rotatedat constant speed, as is also the'spindlelllw The yarn Y is drawn upward frornthe sne r sf through a guide-wire l2 and over a fixed gui de-,

roll l4 and is then directed through a yarn guide l5 to the surface of the take-up roll R. The yarn guide. I5 is pivotally'mounted on atraverse rod l6 which is' slidable between supporting guide-rolls l1 mounted'infixed bearingmembersl8. Any usual mechanism (not shown) may be provided for regularly reciprocating the traverse rod IS, with the result that the yarn is laid on the take-up roll R in a desired helical path which is reversed at each end of the roll.

The parts thus far described in themselves form no part of my present invention which relates-more particularly to the provision of means for jstopping'rotation-of the take-up roll R on yarn-breakage and to the provision of an im- 1 proved pivotal support for the guide-wire I 2.

' The construction of the guide-wire support is clearly disclosed in Fig. 3, which shows the guidewire l2 extending through a transverse hole in a headed stud mounted in a recess 2| in a stationary 'lug'22. A sprin g24 is interposed between-the bottom of the recess 2| and the head of thestud 20; and the lower face of the lug'22 is transversely notched to receive the guide-wire l2 when-in the'full line. operative position indicated infigsql; 2 and 3 or when in the fully inoperative position indicated in dotted lines in Figs. .1 and .3.

h The guide-wire I2 is securely; clamped in the transverse hole in the stud 20 by a washer 26 3 and nut 21 the latter being threaded on the lower end of the stud 20. With this construction, the guideewire l2 will be securely held against twisting inthe stud 20. and may be swung from operative to inoperative position as desired. thereby affording convenient clearance for dofiing'and replacement of 'thespools 'Son the spindles I0. When returned to operation, the guide-wire automatically resumes initial position.

3. My improved stop motion includes a looped detector wire 30 (Fig. 3) secured by a screw 3| to aopntrol member 32 which is pivotally mounted by bearinglugs 33cc rockon a cross-pin 34. The pin .34 is loosely pivoted to swing about a horizontal axisin afixed lugf35, and the Opposite end ,OfWtheIcrOss-pin swings vertically in a slot 36 in a vfixed lug or bracket 31. Upward movementof the pin-is'limitedby astud or screw 38 which .extendsacrossthe slot 36, and downward movementislimited by a tension bar to be described and on whichthe cross-pin rests. The

lugs an d, 3l are secured to a fixed longitudinallyextendedbar or frame member 35* (Fig. 4).

. ,."I"h e member 32 has an upward extension 40' which is disposed in, the path of a block 4! mounted. on the underside of the recipiocated traverse, rod l6 when themember 32 and projection A!) .are in the upright stopping position shown ,in full lines in Fig. 6. I 7

When the machine is runninghowever, the yarn Y is threaded through the looped detector wire 3!] as indicated in dotted lines in Figgd'ari'd the. projection 41! is swungfre arward by yarn tension-out of the path of the block 4!. If the yarn Y breaks or runs out, the detector parts move to the full line position "shown in Fig. '6 and the block 4l' engages'the projection 40 and depresses the member 32 with results to be described.

A tension bar (Fig. 2) is slidable both endwise and vertically in a slot 5| (Fig. 3) in the end of the bar 50 and is connected at its forward end to the stud 54, the spring being under tension between these points of attachment. forward end, the bar 50 is provided with a tooth 60 and a recess 6! (Fig. 7), and also with a knob r handle 62.

I will now more fully describe the operation of my improved stop motion. When starting a yarn package, the end of the yarn is wrapped around a fresh or empty take-up roll R, which roll is mounted in the bearings provided at the upper end of the swinging frame F. The bar isthen moved rearward and upward by manual pressure on the knob 62 until the tooth 60 passes rearward of a cross stud 64 fixed in the bracket 31 (Fig. 5) and is raised to engage said stud, at the same time putting the spring 55 under increased tension-and yieldingly pressing the roll R against the revolving drum D.

The-tension of the spring 55' is sufiicient to overcome the-pressure of a weaker spring 10 (Fig. 2) interposed between afixed lug 'H and a lug 12 projecting rearward from the frame F. Winding of theyarnthen proceeds, with the yarn under sufficient tension to hold the detectormember 32 in the inclined inoperative position shown in dotted lines in Fig. 6.

The-block 4| is regularly reciprocated with-the traverse bar Iii-but clears the projection so long as the yarn pulls themember 32-forward out of "vertical or operative position. When the yarn breaks or runs-out, however, the detector member swings to the full line position in Fig. 6- and the block-4| engages the projection 40, swinging the cross-pin 34 downward and carrying with it the-tension-bar 50, so that the. tooth 60 'no longer engages the fixed stud (5 4 in the bracket The barthen moves forward to the dotted line position shown in Fig. -5, and the stud (Figs. 2 and 4) engages the rear end of the slot 53, so that the spring no longer exerts a rearward pull on the frame F. The frame F and roll R are then free to be moved forwardby the spring to (Fig; 2), thus breaking I the driving contact between the roll Rand thedrum- D. Rotation of the roll R; thereupon promptly ceases.

From the foregoing description it will be clear that the yarn Y is notrequired to actuate any releasing mechanism but merely to hold the projection 40 out of the-path ofthe block M-until yarn breakage occurs. Thereafter, the parts are released by the power-actuated block 4!, thus providing. ample and positive releasing force which becomes active-as soonas the yarn Y releases the detecting member.

It will be understood that a separate detectingto the details herein disclosed, otherwise than as set forth in the claims, but whatI claim is:

1. In a winding machine of the up-twister At its type, in combination, a take-up roll, a swinging frame on which said roll is pivotally supported, a tension bar having a slidable connection with said frame, a tension spring connecting said frame and said bar, a latch-pin with which said bar may be manually engaged, a detecting member, across rod on which said member is pivoted, and a-positively moved actuator for said member, said member having a portion which is positioned for engagement by said actuator when said member is out of yarn engagement and which is clear of said actuator when said member is engaged by the yarn, and said cross rod overlying the latched portion of said bar and being effective to depress and release said bar when said memher is engaged and moved by said actuator.

2. The combination in a winding machine as set forth in claim 1, in which means is provided to swing said frame and take-up roll forward when said tension bar is released.

3. The combination in a winding machine as set'forth in claim 1, in which the detecting member comprises an elongated wire loop through which the yarn is drawn during awinding operation.

move said member when said member is not displaced, and connections through which such engagement and movement of said member is effective to release said pressure-applying device.

5. In a winding machine of the up-twister type having a take-up roll and a driving drum, in combination, a frame for said take-up roll mounted to swing about a fixed pivot, a stop motion comprisinga device to apply pressure to the take-up roll during winding, manual means to latch said pressure-applying device in operative position, power-actuated means to release said device, and a freely pivoted detecting member which renders said poWer-actuated'means operative to release saidpressure-applying device when said member is not engaged by the yarn.

6-. In a winding machine of the up-twister type having a take-up roll and a driving drum, in combination, a stop motion comprising a device to apply pressure to the take-up roll during winding, manual means to latch said device in operative position, a regularly reciprocated releasing element, a cross-pin, a detecting member pivotally mounted on said cross-pin and held by yarn engagement out of position to be normally engaged by said reciprocated element, and a fixed element having a vertical slot, said cross-pin being mounted at one end on a-fixed pivoted and having itsopposite endpositioned to swing in said vertical slot and said opposite end of said cross-pin being moved downward in said slot to release said pressure-applying device when said detecting member is released by yarn failure and is engaged by said reciprocated element.

PACIFIC J. THOMA'S. 

